The DuroMax XP4850EH Generator is powered by the DuroMax 7 hp engine. The engine can accept high wattage loads, and can operate on propane or gasoline. With a flick of a switch, you can easily change your input source from gasoline to propane. This user-friendly generator can also be started with a recoil start, in case of a battery drain-out. When the oil level reduces drastically, the engine automatically shuts down, thus reducing the damage caused. The muffler reduces engine noise, which makes the generator suitable for use in silent zones.